Communications: radio wave antennas – Antennas – Spiral or helical type
Reexamination Certificate
2005-06-14
2005-06-14
Wimer, Michael C. (Department: 2828)
Communications: radio wave antennas
Antennas
Spiral or helical type
Reexamination Certificate
active
06906682
ABSTRACT:
A magnetic interface generator generates a magnetic interface at a center frequency f0. The magnetic interface generator is a passive array of spirals that are deposited on a substrate surface. The magnetic interface is generated in a plane at a distance Z above the surface of the substrate. The distance Z where the magnetic interface is created is determined by the cell size of the spiral array, where the cell size is based on the spiral arm length and the spacing S between the spirals. The center frequency of the magnetic interface is determined by the average track length DAVof the spirals in the spiral array. In embodiments, the spiral array is one sub-layer in a multi-layer substrate. The spacing S of the spiral array is chosen to project the magnetic interface to another layer in the multi-layer substrate so as to improve performance of a circuit in the plane of the magnetic interface. For example, the magnetic interface can be used to increase the inductance of a printed inductor circuit, and to increase the gain and match of a microstrip patch antenna. Furthermore, the magnetic interface reduces the traverse electric (TE) and transverse magnetic (TM) surface waves in the plane of the magnetic interface, which reduces unwanted coupling between transmission lines.
REFERENCES:
patent: 3045237 (1962-07-01), Marston
patent: 3055003 (1962-09-01), Marston et al.
patent: 3152330 (1964-10-01), Chatelain et al.
patent: 4268833 (1981-05-01), Milne
patent: 4804965 (1989-02-01), Roederer
patent: 6407721 (2002-06-01), Mehen et al.
U.S. Appl. No. 10/226,310, filed Aug. 23, 2002.
Alexopoulos, N.G. et al., “Scattering from an Elliptic Cylinder Loaded with an Active or Passive Continuously Variable Surface Impedence,”IEEE Antennas and Propagation, IEEE, vol. AP-22, No. 1, Jan. 1974, p. 132-134.
Broas, R.F.J. et al., “A High-Impedance Ground Plane Applied to a Cellphone Handset Geometry,”IEEE Transactions on Microwave Theory and Techniques, IEEE, vol. 49, No. 7, Jul. 2001, pp. 1262-1265.
Caloz, C. and Itoh, T., “Multilayer and Anisotropic Planar Compact PBG Structures for Microstrip Applications,”IEEE Transactions on Microwave Theory and Techniques, IEEE, vol. 50, No. 9, Sep. 2002, pp. 2206-2208.
Contopanagos, H. et al., “Thin Frequency-Selective Lattices Integrated in Novel Compact MIC, MMIC, and PCA Architectures,”IEEE Transactions on Microwave Theory and Techniques, IEEE, vol. 46, No. 11, Nov. 1998, pp. 1936-1948.
Kyriazidou, C. et al., “Monolithic Waveguide Filters Using Printed Photonic-Bandgap Materials,”IEEE Transactions on Microwave Theory and Techniques, IEEE, vol. 49, No. 2, Feb. 2001, pp. 297-307.
Merrill, W. et al., “Electromagnetic Scattering from a PBG Material Excited by an Electric Line Source,”IEEE Transactions on Microwave Theory and Techniques, IEEE, vol. 47, No. 11, Nov. 1999, pp. 2105-2114.
Park, Y-J. et al., “A Photonic Bandgap (PBG) Structure for Guiding and Suppressing Surface Waves in Millimeter-Wave Antennas,”IEEE Transactions on Microwave Theory and Techniques, IEEE, vol. 49. No. 10, Oct. 2001, pp. 1854-1859.
Sievenpiper, D. et al., “High-Impedance Electromagnetic Surfaces with a Forbidden Frequency Band,”IEEE Transactions on Microwave Theory and Techniques, IEEE, vol. 47, No. 11, Nov. 1999, pp. 2059-2074.
Wu, H-S. and Tzuang, C-K, “PBG-enhanced Inductor,” IEEE MTT-S Digest, IEEE, 2002, pp. 1087-1090.
Copy of International Search Report issued Dec. 10, 2002 for Appln. No. PCT/US02/26746, 4 pages.
Alexopoulos Nicolaos G.
Contopanagos Harry
Kyriazidou Chryssoula
Broadcom Corporation
Sterne Kessler Goldstein & Fox P.L.L.C.
Wimer Michael C.
LandOfFree
Apparatus for generating a magnetic interface and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for generating a magnetic interface and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for generating a magnetic interface and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3502698